How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 2/2100.0*Chance in playoffs100.0*Average seed
YDE 45 Rambam 31 +13.7
+0.5
JEC 64 Magen David 79 In
Flatbush 78 DRS 68 -0.8
+0.2
HANC 65 Ezra 25 -0.3
Haftr 43 North Shore 40 +0.3
If winner is:HomeAway
Shaare T. vs North Shore+0.3-0.3
If winner is:HomeAway
Week of 2/9100.0*Chance in playoffs100.0*Average seed
YDE vs Magen David+0.9-0.9
Magen David vs Flatbush-0.2+0.2
Magen David vs North Shore+0.1-0.1

What If

Chances based on how well the YDE finish out the regular season.   Explain

100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678910Count
71-0In3725382,728,739
60-1In25752,728,381
Total:In191331375,457,120
Games Above .500
Chance Will Make Playoffs